<!DOCTYPE html>
<meta charset="utf-8" />
<title>WebSocket Test</title>
<script language="javascript"type="text/javascript">
    var wsUri ="ws://127.0.0.1:8080/";
    var output;

    var websocket = new WebSocket(wsUri);

    function init() {
        output = document.getElementById("output");
        websocket.onopen = function(evt) {
            onOpen(evt)
        };
        websocket.onclose = function(evt) {
            onClose(evt)
        };
        websocket.onmessage = function(evt) {
            onMessage(evt)
        };
        websocket.onerror = function(evt) {
            onError(evt)
        };
    }

    function sendmessage() {
        var content = document.getElementById("inputtext").value;
        doSend(content);
    }

    function closeConn() {
        websocket.close();
    }

    function onOpen(evt) {
        writeToScreen("CONNECTED");
        doSend("WebSocket rocks");
    }

    function onClose(evt) {
        writeToScreen("DISCONNECTED");
    }

    function onMessage(evt) {
        writeToScreen('<span style="color: blue;">RESPONSE: '+ evt.data+'</span>');

    }

    function onError(evt) {
        writeToScreen('<span style="color: red;">ERROR:</span> '+ evt.data);
    }

    function doSend(message) {
        writeToScreen("SENT: " + message);
        websocket.send(message);
    }

    function writeToScreen(message) {
        var pre = document.createElement("p");
        pre.style.wordWrap = "break-word";
        pre.innerHTML = message;
        output.appendChild(pre);
    }

    window.addEventListener("load", init, false);
</script>
<h2>WebSocket Test</h2>
<input type="text" id="inputtext"/>
<input type="button" id="sendbutton" value="send" onclick="javascript:sendmessage()"/>
<br>
<input type="button" id="closebutton" value="close" onclick="javascript:closeConn()"/>
<div id="output"></div>
</html>